Boxer cabin vent hole size and spacing

Hello, would someone be so kind to measure the hole size and approximate spacing of the group of small vent holes in the rear of the cabin? I’m recovering the leather of this part and can’t use the old one as a basis because it has already been recovered in the past and it is not close to the original.
While in storage I left the door glass 5cm open, a rat jumped In (I could see the footprints on the door) and couldn’t get back out, it gnawed at the leather in this area because I guess it could feel the fresh air. The rat died on the passenger floor carpet and luckily didn’t do more damage than this (and of course making me remove and deep clean everything else).
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Thank you very much Ludwig, so holes are close to 1/8” and I do see a triangle like pattern, will try to replicate it. Does that tape have two different inch scales? Continental?

 

Willrace, the holes are no longer original so I can’t use those as a sample, but the idea of making a template is a good one, that way I can be more precise.

 

Just finished recovering the rear window panel, I’m not very experienced in this area but I think it is better than before (even without the damage).
I have to ask, is everything riveted from the factory or is this something from the previous repair? Are the suitcase belt gudes supposed to be riveted too?
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Thank you ag512bbi, I’ll source some long pop rivets for that, PO recarpeted the car and I find screws on some locations and rivets on others, I’m guessing there should be only rivets? I found screws in the following places: accel plastic pedal cover, rocker panel covers under the ashtrays, center tunnel covers.